/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2011-2017, 2019-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#ifndef _KBASE_CONTEXT_H_
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#define _KBASE_CONTEXT_H_
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#include <linux/atomic.h>
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/**
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* kbase_context_debugfs_init - Initialize the kctx platform
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* specific debugfs
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*
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* @kctx: kbase context
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*
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* This initializes some debugfs interfaces specific to the platform the source
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* is compiled for.
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*/
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void kbase_context_debugfs_init(struct kbase_context *const kctx);
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/**
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* kbase_context_debugfs_term - Terminate the kctx platform
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* specific debugfs
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*
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* @kctx: kbase context
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*
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* This terminates some debugfs interfaces specific to the platform the source
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* is compiled for.
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*/
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void kbase_context_debugfs_term(struct kbase_context *const kctx);
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/**
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* kbase_create_context() - Create a kernel base context.
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*
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* @kbdev: Object representing an instance of GPU platform device,
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* allocated from the probe method of the Mali driver.
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* @is_compat: Force creation of a 32-bit context
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* @flags: Flags to set, which shall be any combination of
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* BASEP_CONTEXT_CREATE_KERNEL_FLAGS.
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* @api_version: Application program interface version, as encoded in
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* a single integer by the KBASE_API_VERSION macro.
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* @filp: Pointer to the struct file corresponding to device file
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* /dev/malixx instance, passed to the file's open method.
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*
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* Up to one context can be created for each client that opens the device file
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* /dev/malixx. Context creation is deferred until a special ioctl() system call
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* is made on the device file. Each context has its own GPU address space.
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*
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* Return: new kbase context or NULL on failure
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*/
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struct kbase_context *
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kbase_create_context(struct kbase_device *kbdev, bool is_compat,
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base_context_create_flags const flags,
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unsigned long api_version,
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struct file *filp);
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/**
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* kbase_destroy_context - Destroy a kernel base context.
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* @kctx: Context to destroy
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*
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* Will release all outstanding regions.
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*/
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void kbase_destroy_context(struct kbase_context *kctx);
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/**
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* kbase_ctx_flag - Check if @flag is set on @kctx
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* @kctx: Pointer to kbase context to check
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* @flag: Flag to check
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*
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* Return: true if @flag is set on @kctx, false if not.
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*/
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static inline bool kbase_ctx_flag(struct kbase_context *kctx,
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enum kbase_context_flags flag)
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{
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return atomic_read(&kctx->flags) & flag;
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}
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/**
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* kbase_ctx_flag_clear - Clear @flag on @kctx
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* @kctx: Pointer to kbase context
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* @flag: Flag to clear
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*
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* Clear the @flag on @kctx. This is done atomically, so other flags being
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* cleared or set at the same time will be safe.
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*
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* Some flags have locking requirements, check the documentation for the
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* respective flags.
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*/
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static inline void kbase_ctx_flag_clear(struct kbase_context *kctx,
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enum kbase_context_flags flag)
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{
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atomic_andnot(flag, &kctx->flags);
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}
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/**
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* kbase_ctx_flag_set - Set @flag on @kctx
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* @kctx: Pointer to kbase context
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* @flag: Flag to set
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*
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* Set the @flag on @kctx. This is done atomically, so other flags being
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* cleared or set at the same time will be safe.
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*
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* Some flags have locking requirements, check the documentation for the
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* respective flags.
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*/
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static inline void kbase_ctx_flag_set(struct kbase_context *kctx,
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enum kbase_context_flags flag)
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{
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atomic_or(flag, &kctx->flags);
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}
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#endif /* _KBASE_CONTEXT_H_ */
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